forked from osmocom/wireshark
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/* codec-g729a.c
|
|
* Easy codecs stub for EasyG729A
|
|
* 2007 Tomas Kukosa
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <glib.h>
|
|
#include <memory.h>
|
|
|
|
#include "codec-g729a.h"
|
|
|
|
#include "EasyG729A/EasyG729A.h"
|
|
|
|
struct g729a_context {
|
|
CODER_HANDLE handle;
|
|
short speach_buffer[L_G729A_FRAME];
|
|
};
|
|
|
|
void *codec_g729a_init(void) {
|
|
struct g729a_context *ctx = 0;
|
|
|
|
ctx = (struct g729a_context*)g_malloc0(sizeof(struct g729a_context));
|
|
ctx->handle = EasyG729A_init_decoder();
|
|
return ctx;
|
|
}
|
|
|
|
void codec_g729a_release(void *context) {
|
|
struct g729a_context *ctx = (struct g729a_context*)context;
|
|
|
|
if (!ctx) return;
|
|
EasyG729A_release_decoder(ctx->handle);
|
|
g_free(ctx);
|
|
}
|
|
|
|
int codec_g729a_decode(void *context, const void *input, int inputSizeBytes, void *output, int *outputSizeBytes) {
|
|
struct g729a_context *ctx = (struct g729a_context*)context;
|
|
const unsigned char *bitstream = (const unsigned char*)input;
|
|
short *speech = (short*)output;
|
|
int decodedBytes = 0;
|
|
|
|
if (!ctx) return 0;
|
|
|
|
if ((inputSizeBytes % L_G729A_FRAME_COMPRESSED) != 0)
|
|
return 0;
|
|
|
|
if (!output)
|
|
return (inputSizeBytes / L_G729A_FRAME_COMPRESSED) * L_G729A_FRAME * sizeof(short);
|
|
|
|
while ((inputSizeBytes >= L_G729A_FRAME_COMPRESSED) &&
|
|
((*outputSizeBytes - decodedBytes) >= L_G729A_FRAME * sizeof(short))) {
|
|
if (EasyG729A_decoder(ctx->handle, (unsigned char*)bitstream, ctx->speach_buffer)) {
|
|
memcpy(speech, ctx->speach_buffer, L_G729A_FRAME * sizeof(short));
|
|
speech += L_G729A_FRAME;
|
|
decodedBytes += L_G729A_FRAME * sizeof(short);
|
|
}
|
|
bitstream += L_G729A_FRAME_COMPRESSED;
|
|
inputSizeBytes -= L_G729A_FRAME_COMPRESSED;
|
|
}
|
|
|
|
return decodedBytes;
|
|
}
|
|
|